Medicare decisions are easier when you understand what each part covers, when you can enroll, and why reviewing your coverage each year matters. The right path depends on your health needs, prescriptions, preferred providers, budget, and other coverage you may have. Stieber Insurance can help you organize the questions and evaluate your options with confidence.

Start With the Four Parts of Medicare

Medicare is federal health insurance primarily for people age 65 and older, as well as certain people under 65 with qualifying disabilities or medical conditions. Its parts work together differently depending on the coverage route you choose.

• Part A is hospital insurance. It helps cover inpatient hospital care, skilled nursing facility care, hospice care, and certain home health services.
• Part B is medical insurance. It helps cover doctor visits, outpatient care, preventive services, durable medical equipment, and more.
• Part C, also called Medicare Advantage, is an alternative way to receive Medicare benefits through a Medicare-approved private plan. These plans include Part A and Part B and usually include Part D prescription drug coverage.
• Part D helps cover prescription drugs. It can be purchased as a stand-alone plan with Original Medicare or may be included in a Medicare Advantage plan.

With Original Medicare, you receive Part A and Part B directly through Medicare. You may add a Part D plan and, if appropriate, a Medicare Supplement Insurance policy, commonly called Medigap, to help with certain out-of-pocket costs. With Medicare Advantage, plan networks, costs, benefits, drug coverage, and service rules can vary by plan and location.

Know Your First Enrollment Window

For many people, the first major Medicare deadline is the Initial Enrollment Period. It generally lasts seven months: the three months before the month you turn 65, your birthday month, and the three months after it.

Enrolling on time can help prevent gaps in coverage and may help you avoid late-enrollment penalties. However, the right timing is not always automatic. If you or your spouse is still actively working and you have health coverage through that employer, you may qualify for a Special Enrollment Period later. The size of the employer and the type of coverage matter, so it is important not to assume that every employer plan works the same way.

Before making a decision, compare your current coverage with Medicare costs and benefits. If you contribute to a health savings account, ask about the interaction between Medicare enrollment and HSA contributions before choosing a start date.

Important Medicare Dates and Deadlines

Marking the major enrollment periods on your calendar can make Medicare more manageable. Here are the dates most people should know:

• Initial Enrollment Period: Generally, the seven-month period surrounding your 65th birthday month.
• General Enrollment Period: January 1 through March 31 each year. This may be an option for people who missed their initial chance to enroll in Part B or premium Part A and do not qualify for a Special Enrollment Period. Coverage generally begins the month after you enroll, and a late penalty may apply.
• Medicare Advantage Open Enrollment Period: January 1 through March 31. This period is for people already enrolled in a Medicare Advantage plan. Eligible members may switch to another Medicare Advantage plan or return to Original Medicare and, if needed, enroll in a separate Part D plan.
• Annual Medicare Open Enrollment: October 15 through December 7 every year. During this window, you can review and make certain changes to Medicare Advantage or Part D prescription drug coverage for the following year. Changes take effect January 1 if the plan receives the request by December 7.

For 2026, October 1 is a useful planning date: plan information for 2027 becomes available for comparison before Annual Open Enrollment begins on October 15, 2026. That extra time can help you review notices, prescriptions, providers, and projected costs without rushing.

When a Special Enrollment Period May Apply

Life changes can create a Special Enrollment Period, or SEP, outside the standard calendar windows. Common situations include losing qualifying employer coverage, moving outside a plan’s service area, losing other creditable drug coverage, or becoming eligible for certain financial-assistance programs.

SEP rules vary by circumstance. For example, people leaving coverage tied to current employment often have a limited time to enroll in Part B, and COBRA does not function the same way as active employer coverage for this purpose. Because timing and eligibility are situation-specific, review your circumstances promptly rather than waiting for the next Annual Open Enrollment period.

Why an Annual Policy Review Matters

Choosing a Medicare plan is not a one-time decision. Plans can change from year to year, including their premiums, deductibles, copayments, provider networks, pharmacy networks, formularies, and extra benefits. Your needs can change, too. A new medication, a preferred doctor leaving a network, a planned procedure, or a change in travel habits can all affect whether your current coverage remains a good fit.

An annual Medicare policy review with Stieber Insurance can help you look beyond a plan’s headline premium. A thoughtful review considers your doctors, specialists, hospitals, prescription list and dosages, preferred pharmacies, expected care, and comfort with network rules. The goal is not simply to change plans; it is to confirm that your current coverage still supports your priorities for the coming year.

A Practical Medicare Review Checklist

Set aside time before October 15 to gather the information you will need. Bring your current plan materials, especially the Annual Notice of Change, and create a current medication list that includes drug names, doses, and how often you take them.

• Confirm that your doctors, specialists, and preferred hospitals are available under the coverage you are considering.
• Check each prescription drug in the plan formulary and compare pharmacy options.
• Review monthly premiums alongside deductibles, copays, coinsurance, and maximum out-of-pocket costs where applicable.
• Consider travel, access to care, dental, vision, hearing, and other benefits that matter to you.
• Ask how referrals, prior authorization, and out-of-network care may work.

Keep in mind that Medicare coverage is individual. Spouses do not have to choose the same plan, even when they have similar health needs.

Get Help Before You Decide

Medicare choices can involve details that are easy to overlook, especially when you are transitioning from employer coverage or considering a change. Stieber Insurance can help you understand Medicare basics, prepare for enrollment deadlines, and conduct a policy review based on the coverage questions that matter most to you. For official Medicare information, plan comparisons, and enrollment guidance, Medicare.gov and 1-800-MEDICARE are valuable resources.

FAQ

Do I have to enroll in Medicare when I turn 65?

Not always. Some people have active employer coverage that allows them to delay certain Medicare enrollment decisions. The rules depend on the employer coverage and your situation, so confirm your options before postponing enrollment.

What is the difference between Medicare Advantage and Medigap?

Medicare Advantage is a way to receive Part A and Part B benefits through a private Medicare-approved plan. Medigap is supplemental insurance that works with Original Medicare to help pay certain out-of-pocket costs. You generally cannot use a Medigap policy with a Medicare Advantage plan.

Can I change my Medicare plan every year?

Many people can make changes to Medicare Advantage or Part D coverage during Annual Medicare Open Enrollment, October 15 through December 7. The changes generally begin January 1 of the following year.

Why should I review my prescription coverage annually?

Drug formularies, pharmacy networks, copays, and medication needs can change. Reviewing your medications each year can help you identify whether your current drug coverage still fits your needs.

What happens if I miss an enrollment deadline?

Your options depend on the coverage involved and whether you qualify for a Special Enrollment Period. You may have to wait for a future enrollment period, and a late-enrollment penalty could apply in some situations. Seek guidance as soon as possible.